One of the OSTs comes with an audio play that sees the characters attending the premiere of a movie based off of their adventures. The entire story is one long CMOF, with notable moments including the movie swapping Rain and Sai Saici's roles (making Rain part of the Five-Man Band and Sai the Distressed Damsel, to the real Sai's annoyance) and a scene where the heroes stand at the base of Tokyo Tower and shout up at Master Asia, with the conversation rapidly becoming distorted and confused due to the distance.
While training, Sai Saici drops in to cause some mischief, even lifting up Rain's skirt and showing her white panties. After he runs off into the distance, Rain asks Domon if he saw. His answer? He turns beet red and falls underwater.
Sai Saici drops in on Domon at the place he's staying during the finals. He arrives speeding on a bike with a few bags of groceries and a wok, only to trip and lose control as everything goes flying, but manages to regain his balance, catch the bike and the bags perfectly without spilling a thing. Then the wok hits him on his head and he falls over and spills everything.
The original manga adaptation gave us a backup feature, Go For It, Domon! - a Yonkoma featuring the G Gundam characters taken out of canonical events and played off of each other for laughs. The entire strip runs on Rule of Funny, and one Running Gag has Fuunsaiki (Master Asia's horse) outranking Domon as Master Asia's first (and favorite) student!
And then the series continues into the Gundam Wing adaptation, only with Wing characters added and creating new rivalries with the Gundam Fighters.